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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 65 |
| 3 | 730 |
| 4 | 4097 |
| 5 | 15626 |
| 6 | 46657 |
| 7 | 117650 |
| 8 | 262145 |
| 9 | 531442 |
| 10 | 1000001 |
| 11 | 1771562 |
| 12 | 2985985 |
| 13 | 4826810 |
| 14 | 7529537 |
| 15 | 11390626 |
| 16 | 16777217 |
| 17 | 24137570 |
| 18 | 34012225 |
| 19 | 47045882 |
| 20 | 64000001 |
| 21 | 85766122 |
| 22 | 113379905 |
| 23 | 148035890 |
[1,2,65,730,4097,15626,46657,117650,262145,531442, 1000001,1771562,2985985,4826810,7529537,11390626, 16777217,24137570,34012225,47045882,64000001, 85766122,113379905,148035890] |